Deep ocean trenches typically are not located adjacent to abyssal plains transform plate boundaries young continental mountains volcanic island arc chains

Transform plate boundaries

Explanation: As transform plate boundary is the surface where the plates present slides from side of each other this is why deep ocean trenches are not adjacent to it. Lithosphere at the transform plate boundary does not get created or destroyed.They are usually found near the sea floor.They are also considered as the main reason behind the natural calamities like tsunami ,earthquakes etc.

no

explanation:

since the earth is flattened at the poles and bulges at the equator, geodesy represents the figure of the earth as an oblate spheroid. the oblate spheroid, or oblate ellipsoid, is an ellipsoid of revolution obtained by rotating an ellipse about its shorter axis.

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the answer you are looking for is relatively steep.

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